PVC film production device and production process thereof

Abstract

The invention relates to the technical field of high polymer material processing, in particular to a PVC (polyvinyl chloride) film production device and a production process thereof.The production process comprises the steps of receiving a PVC film production instruction, confirming the PVC film production device based on the PVC film production instruction, confirming an initial raw material set based on a formula node set, and executing preprocessing operation on the initial raw material set based on a microwave processing parameter set and a microwave preprocessor, the method comprises the following steps: processing raw materials to obtain a processed raw material set, performing primary mixing operation on the processed raw material set by using a primary mixer to obtain a primary mixture, performing extrusion operation on a surface layer mixture, a middle layer mixture and an inner layer mixture by using a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head to obtain an extruded material, and cooling the extruded material by using the cooler to obtain a formed material, and winding the formed material by using the winder to obtain the target PVC film. According to the invention, the high efficiency and adaptability of PVC film production can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer material processing, in particular to a PVC film production device and a production process thereof. Background Art

[0002] PVC film is a widely used polymer film, playing an important role in a variety of fields due to its excellent physical and chemical properties. In the packaging field, PVC film can be used to preserve and seal food and pharmaceutical packaging. In the construction industry, PVC film is used to manufacture decorative materials such as PVC flooring and wallpaper. In the electronics field, PVC film is used as an insulating material to protect electronic components. Therefore, the diversified production of PVC film is of great significance to meet the application needs of various fields.

[0003] Traditional PVC film production processes have numerous shortcomings. First, the raw material pretreatment stage is inefficient, and the cooling process is not precise enough, which can easily lead to uneven film formation and affect the product's appearance and performance. Second, traditional PVC film production processes cannot accurately determine the specific required performance of each layer of the target PVC film. These shortcomings not only increase production costs, but also limit the expansion of PVC film in high-end applications, reducing product quality and market competitiveness. Therefore, the efficiency and adaptability of PVC film production need to be improved. Summary of the Invention

[0004] The present invention provides a PVC film production process, the main purpose of which is to improve the efficiency and adaptability of PVC film production.

[0005] To achieve the above object, the present invention provides a PVC film production process, comprising: receiving a PVC film production instruction, and identifying a PVC film production device based on the PVC film production instruction, wherein the PVC film production device includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit, and a post-processing unit, wherein the raw material pretreatment unit includes: a microwave pre-processor, a temporary conveying pipeline, a circulation container, and a preliminary mixer, the multi-layer mixing unit includes: a surface layer mixer, a middle layer mixer, and an inner layer mixer, the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder, and a co-extrusion die, and the post-processing unit includes: a cooler and a winder; Obtaining a target PVC film recipe ratio, determining a recipe node set based on the recipe ratio, wherein the recipe node set includes multiple recipe nodes, and each recipe node includes a recipe raw material type and recipe raw material weight, and determining an initial raw material set based on the recipe node set; obtaining a microwave processing parameter set, performing a preprocessing operation on an initial raw material set based on the microwave processing parameter set and a microwave preprocessor to obtain a processed raw material set, placing the processed raw material set in the temporary conveying pipeline, and confirming a status of the processed raw material set using a preset detection method, wherein the status is a qualified state or an unqualified state. After confirming that the status of the processed raw material set is a qualified state, performing a preliminary mixing operation on the processed raw material set using the preliminary mixer to obtain a preliminary mixed material; Obtaining target properties of a target PVC film, and obtaining a surface layer mixture, a middle layer mixture, and an inner layer mixture based on the target properties, the preliminary mixture, and the multi-layer mixing unit; Utilizing a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head, an extrusion operation is performed on the surface layer mixture, the middle layer mixture and the inner layer mixture to obtain extruded materials; The cooler is used to cool the extruded material to obtain a molded material, and the winder is used to wind the molded material to obtain a target PVC film.

[0006] Optionally, determining the initial raw material set based on the recipe node set includes: Perform the following operations on each recipe node in the recipe node set: Extracting the type of the formula raw material from the formula node, and using the type of the formula raw material to confirm the weight of the raw material corresponding to the type of the formula raw material in a pre-built raw material library to obtain the inventory weight of the raw material; Obtain inventory safety ratio, and obtain inventory safety weight based on the weight of formula raw materials and inventory safety ratio; Compare the weight of raw materials in stock with the safety weight of stock; If the weight of the raw materials in stock is greater than the safety weight of the stock, initial raw materials are obtained based on the raw material library, wherein the weight of the initial raw materials is the weight of the formula raw materials; otherwise, the weight of the supplementary raw materials is obtained using a preset supplement method, the sum of the weight of the supplementary raw materials and the weight of the formula raw materials is calculated to obtain an updated weight of the raw materials in stock, the updated weight of the raw materials in stock is used as the weight of the raw materials in stock, and the process returns to the step of comparing the weight of the raw materials in stock with the safety weight of the stock, until the weight of the raw materials in stock is greater than the safety weight of the stock; The initial raw materials are aggregated to obtain an initial raw material set.

[0007] Optionally, after confirming that the status of the processed raw material set is qualified, the following steps are performed: Acquire a monitoring temperature interval, wherein the monitoring temperature interval includes a maximum monitoring temperature value and a minimum monitoring temperature value; Get the total particle size detection time; The temperature of the processed raw material set is monitored in real time using a preset temperature monitoring technology to obtain a monitoring temperature; comparing the monitored temperature with the monitored temperature range; When the monitored temperature enters the monitoring temperature interval, the time of entering the monitoring temperature interval is used as the detection start time, and a first particle size set and a second particle size set are obtained based on the detection start time, the total particle size detection time, the preset number of detections, the temperature monitoring technology, and the pre-established particle size detection technology, wherein the first particle size set includes multiple first particle sizes and the second particle size set includes multiple second particle sizes; Calculating the mean and standard deviation of the first particle sizes in the first particle size set respectively to obtain the first particle size mean and the first particle size standard deviation; Calculate the mean and standard deviation of the second particle sizes in the second particle size set respectively to obtain the second particle size mean and the second particle size standard deviation; Obtaining a first weight and a second weight based on the first particle size set and the second particle size set, wherein the first weight is greater than the second weight, and the sum of the first weight and the second weight is 1, wherein the first particle size set corresponds to the first weight, and the second particle size set corresponds to the second weight; The process capability index is obtained based on the first particle size mean, the second particle size mean, the first particle size standard deviation, the second particle size standard deviation, the first weight, the second weight, and a pre-established process capability index calculation formula, wherein the process capability index calculation formula is as follows: ;in, represents the process capability index, represents the first particle size mean, represents the second particle size mean, represents the first particle size standard deviation, represents the second particle size standard deviation, represents the first weight, represents the second weight, Indicates the preset upper limit of particle size. Indicates the preset lower limit of particle size. Indicates taking the minimum value; comparing the process capability index with a preset process capability index threshold; If the process capability index is less than the process capability index threshold, the state of the processed raw material set is confirmed as an unqualified state and the processed raw material set is placed in the circulation container. The updated process capability index is obtained using a pre-built update method, and the updated process capability index is used as the process capability index and the step of comparing the process capability index with the preset process capability index threshold is returned until the process capability index is greater than or equal to the process capability index threshold, and the state of the processed raw material set is confirmed as a qualified state.

[0008] Optionally, obtaining the total particle size detection time includes: Obtain microwave-treated samples to confirm the total particle size measurement time; Acquire a detection experiment distance for setting a temperature experiment detection point, and confirm a plurality of temperature experiment detection points on the temporary conveying pipeline according to the detection experiment distance; Based on multiple temperature experiment detection points, microwave-treated samples, a preset experiment start time, a preset experiment end time, a preset number of experiments, and the temperature monitoring technology, multiple temperature experiment node sets are obtained, wherein the temperature experiment detection points correspond to the temperature experiment node sets one by one, and the temperature experiment node sets include multiple temperature experiment nodes, each temperature experiment node includes an experiment time and an experiment temperature value; Get the total particle size detection time based on multiple temperature experiment node sets.

[0009] Optionally, obtaining the total particle size detection time based on multiple temperature experiment node sets includes: The following operations are performed on each of the multiple temperature experiment node sets: Sort the temperature experiment nodes in the temperature experiment node set according to the order of the experiment times corresponding to the temperature experiment nodes from front to back to obtain a temperature experiment node sequence; Summarize the temperature experiment node sequences to obtain multiple temperature experiment node sequences; The total particle size detection time is obtained based on multiple temperature experiment node sequences, the maximum monitoring temperature value, the minimum monitoring temperature value, and a pre-built particle size detection total time calculation formula, wherein the particle size detection total time calculation formula is as follows: ;in, is the total time of particle size detection, Indicates shared A sequence of temperature experiment nodes, Indicates that there are a total of Temperature experiment nodes, Indicates the The first temperature experiment node in the sequence The experimental time corresponding to the temperature experimental node, Indicates the The first temperature experiment node in the sequence The experimental time corresponding to the temperature experimental node, Indicates the The first temperature experiment node in the sequence The experimental time corresponding to the first temperature experiment node is The absolute difference in time intervals between the experimental moments corresponding to the temperature experimental nodes, Indicates the The first temperature experiment node in the sequence The experimental temperature value corresponding to each temperature experiment node, Indicates the minimum monitoring temperature value, represents the maximum monitored temperature value, Represents a preset indicator function that returns 1 when the condition is met, otherwise it returns 0.

[0010] Optionally, the acquiring of the first particle size set and the second particle size set based on the detection start time, the total particle size detection time, the preset number of detections, the temperature monitoring technology, and the pre-established particle size detection technology includes: Acquire multiple detection moments based on the detection start time, the total particle size detection time, and the number of detections; Acquire a detection node set using multiple detection times, the temperature monitoring technology, and the particle size detection technology, wherein the detection node set includes multiple detection nodes, and each detection node includes a detection time, a detection temperature, and a detection particle size; The following operations are performed on each detection node in the detection node set: acquiring a first temperature interval based on the monitored temperature interval; If the detected temperature corresponding to the detection node is within the first temperature range, the detected particle size corresponding to the detection node is used as the first particle size; otherwise, the detected particle size corresponding to the detection node is used as the second particle size; The first particle size and the second particle size are respectively summarized to obtain a first particle size set and a second particle size set.

[0011] Optionally, obtaining a surface layer mixture, a middle layer mixture, and an inner layer mixture based on the target performance, the preliminary mixture, and the multi-layer mixing unit includes: Performing an analysis operation on the target performance using a preset analysis method to obtain a surface additive node set, wherein the surface additive node set includes one or more surface additive nodes, and each surface additive node includes an additive name and an additive ratio; Obtaining the weight of the preliminary mixture to obtain the preliminary mixture weight; For each of the one or more surface additive nodes, perform the following operations: Obtaining the surface additive to be mixed corresponding to the surface additive node based on the preliminary mixture weight, additive name, additive ratio and a pre-built additive library; Summarizing the surface layer auxiliary agents to be mixed to obtain a surface layer auxiliary agent set; Obtaining a middle-layer set of to-be-mixed additives and an inner-layer set of to-be-mixed additives based on the analysis method, target performance, and the additive library; Divide the preliminary mixture into a surface layer preliminary mixture, a middle layer preliminary mixture and an inner layer preliminary mixture according to a preset ratio; The surface mixer is used to perform a secondary mixing operation on the surface auxiliary agent set to be mixed and the surface preliminary mixed material to obtain a surface mixed material; The middle layer mixture and the inner layer mixture are obtained based on the middle layer auxiliary agent set to be mixed, the inner layer auxiliary agent set to be mixed, the middle layer preliminary mixture, the inner layer preliminary mixture, the middle layer mixer and the inner layer mixer.

[0012] Optionally, the step of cooling the extruded material using the cooler to obtain the molded material comprises: Obtaining a temperature range of the material after extrusion, obtaining the temperature range of the material after extrusion, and obtaining a cooling range set based on the temperature range of the material after extrusion, wherein the cooling range set includes a target high temperature range, a target medium temperature range, and a target low temperature range; Identifying an initial high-temperature cooling zone, an initial medium-temperature cooling zone, and an initial low-temperature cooling zone based on the cooler; Obtaining a target high-temperature cooling zone, a target medium-temperature cooling zone, and a target low-temperature cooling zone based on the initial high-temperature cooling zone, the initial medium-temperature cooling zone, the initial low-temperature cooling zone, and the cooling interval set; The cooler and the preset cooling method are used to make the extruded material pass through the target high-temperature cooling zone, the target medium-temperature cooling zone and the target low-temperature cooling zone in sequence to obtain the molded material.

[0013] Optionally, acquiring the target high-temperature cooling zone, the target medium-temperature cooling zone, and the target low-temperature cooling zone based on the initial high-temperature cooling zone, the initial medium-temperature cooling zone, the initial low-temperature cooling zone, and the cooling interval set includes: Obtaining an initial high temperature interval based on the initial high temperature cooling zone; Compare the maximum temperature value corresponding to the initial high temperature interval with the minimum temperature value corresponding to the target high temperature interval, and the minimum temperature value corresponding to the initial high temperature interval with the maximum temperature value corresponding to the target high temperature interval; If the maximum temperature value corresponding to the initial high temperature interval is less than the minimum temperature value corresponding to the target high temperature interval or the minimum temperature value corresponding to the initial high temperature interval is greater than the maximum temperature value corresponding to the target high temperature interval, the target high temperature interval and the initial high temperature cooling area are used to obtain the target high temperature cooling area. Otherwise, a high temperature overlap ratio is obtained based on the initial high temperature interval and the target high temperature interval, wherein the high temperature overlap ratio is the ratio of the absolute temperature difference of the overlapping portion between the initial high temperature interval and the target high temperature interval to the absolute temperature difference of the target high temperature interval. comparing the high temperature coincidence ratio with a preset coincidence ratio threshold; If the high-temperature coincidence ratio is greater than the coincidence ratio threshold, the initial high-temperature cooling zone is used as the target high-temperature cooling zone; otherwise, the initial high-temperature cooling zone is adjusted using a preset adjustment method to obtain an updated initial high-temperature interval, the updated initial high-temperature interval is used as the initial high-temperature interval, and the process returns to the step of obtaining the high-temperature coincidence ratio based on the initial high-temperature interval and the target high-temperature interval until the high-temperature coincidence ratio is greater than the coincidence ratio threshold, thereby obtaining the target high-temperature cooling zone; The target medium-temperature cooling area and the target low-temperature cooling area are obtained based on the initial medium-temperature cooling area and the target medium-temperature interval, and the initial low-temperature cooling area and the target low-temperature interval, respectively.

[0014] To achieve the above object, the present invention further provides a PVC film production system, comprising: An initial raw material acquisition module is used to receive a PVC film production instruction and identify a PVC film production device based on the PVC film production instruction, wherein the PVC film production device includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit and a post-processing unit, wherein the raw material pretreatment unit includes: a microwave pre-processor, a temporary conveying pipeline, a circulation container and a preliminary mixer, the multi-layer mixing unit includes: a surface layer mixer, a middle layer mixer and an inner layer mixer, the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head, and the post-processing unit includes: a cooler and a winder; Obtaining a target PVC film recipe ratio, determining a recipe node set based on the recipe ratio, wherein the recipe node set includes multiple recipe nodes, and each recipe node includes a recipe raw material type and recipe raw material weight, and determining an initial raw material set based on the recipe node set; a multi-layer mixing module, configured to obtain a microwave processing parameter set, perform a preprocessing operation on an initial raw material set based on the microwave processing parameter set and a microwave preprocessor to obtain a processed raw material set, place the processed raw material set in the temporary conveying pipeline, and confirm a status of the processed raw material set using a preset detection method, wherein the status is either a qualified state or an unqualified state. After confirming that the status of the processed raw material set is a qualified state, perform a preliminary mixing operation on the processed raw material set using the preliminary mixer to obtain a preliminary mixed material; Obtaining target properties of a target PVC film, and obtaining a surface layer mixture, a middle layer mixture, and an inner layer mixture based on the target properties, the preliminary mixture, and the multi-layer mixing unit; A multi-layer extrusion module is used to extrude the surface layer mixture, the middle layer mixture and the inner layer mixture using a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head to obtain extruded materials; The cooling and winding module is used to use the cooler to cool the extruded material to obtain the molded material, and use the winder to wind the molded material to obtain the target PVC film.

[0015] In order to solve the above problem, the present invention further provides an electronic device, comprising: A memory storing at least one instruction; and a processor executing the instruction stored in the memory to implement the above-mentioned PVC film production process.

[0016] In order to solve the above problems, the present invention also provides a computer-readable storage medium, in which at least one instruction is stored. The at least one instruction is executed by a processor in an electronic device to implement the above-mentioned PVC film production process.

[0017] The present invention is to solve the problem described in the background technology. The present invention receives a PVC film production instruction and identifies a PVC film production device based on the PVC film production instruction, wherein the PVC film production device includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit and a post-processing unit, wherein the raw material pretreatment unit includes: a microwave preprocessor, a temporary conveying pipeline, a circulation container and a preliminary mixer, wherein the multi-layer mixing unit includes: a surface mixer, a middle layer mixer and an inner layer mixer, wherein the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head, wherein the post-processing unit includes: a cooler and a winder, obtains the formula ratio of the target PVC film, and identifies a formula node set based on the formula ratio, wherein the formula node set includes multiple formula nodes, and each formula node includes the type of formula raw materials and the weight of formula raw materials, and identifies the initial raw material set based on the formula node set. It can be seen that the present invention dynamically adjusts the raw material inventory by comparing the inventory raw material weight with the inventory safety weight, combining the inventory safety ratio and the preset replenishment method, to ensure that the raw materials required for production are sufficient and safe, improve production stability and efficiency, and reduce the risk of production interruption due to insufficient raw materials. A microwave processing parameter set is obtained, and a preprocessing operation is performed on the initial raw material set based on the microwave processing parameter set and the microwave preprocessor to obtain a processed raw material set. The processed raw material set is placed in the temporary conveying pipeline, and the status of the processed raw material set is confirmed by a preset detection method, wherein the status is a qualified state or an unqualified state. After confirming that the status of the processed raw material set is a qualified state, the preliminary mixer is used to perform a preliminary mixing operation on the processed raw material set to obtain a preliminary mixture. It can be seen that the present invention screens out the particle size data of the processed raw material set in a stable state by setting the monitoring temperature range and the first temperature range, thereby improving the detection accuracy.Calculating the process capability index and adjusting the microwave processing parameter set to ensure that the processed raw materials are collected and enter the next production link can improve the quality of the PVC film and obtain the target performance of the target PVC film. Based on the target performance, the preliminary mixture and the multi-layer mixing unit, the surface layer mixture, the middle layer mixture and the inner layer mixture are obtained. It can be seen that the present invention analyzes the target performance of the target PVC film through a preset analysis method, and after accurately determining the specific required performance of each layer, the additives of each layer are deployed accordingly, which not only meets the specific requirements of each layer, but also improves the adaptability of the target PVC film in the production process, thereby better meeting the diversified application requirements of the target PVC film, and utilizing the surface layer extruder, the middle layer extruder, the inner layer extruder, the surface layer extruder, the middle layer extruder and the inner layer extruder. The layer extruder and co-extrusion die extrudes the surface layer mixture, the middle layer mixture, and the inner layer mixture to obtain an extruded material. The extruded material is then cooled by the cooler to obtain a formed material. The formed material is then reeled up by the reel to obtain the target PVC film. This demonstrates that the present invention achieves precise, step-by-step cooling of the extruded material by setting cooling zones of varying temperatures. A multi-stage gradient cooling process (high temperature to medium temperature to low temperature) is employed to precisely control the cooling rate of the target PVC film, avoiding internal stress concentration, deformation, or surface defects caused by sudden cooling. This effectively ensures the performance stability and dimensional accuracy of the target PVC film during the cooling process, thereby improving product quality and production efficiency. Therefore, the present invention can enhance the efficiency and adaptability of PVC film production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a process for producing a PVC film according to an embodiment of the present invention; Figure 2 A functional module diagram of a PVC film production system provided by one embodiment of the present invention; Figure 3 A schematic structural diagram of an electronic device for implementing the PVC film production process provided by one embodiment of the present invention; Figure 4 This is a schematic structural diagram of a PVC film production device provided in one embodiment of the present invention.

[0019] Description of reference numerals: 1. Electronic device; 10. Processor; 11. Memory; 12. Bus; 100. A PVC film production system; 101. Initial raw material acquisition module; 102. Multi-layer mixing module; 103. Multi-layer extrusion module; 104. Cooling and winding module.

[0020] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0021] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The present invention provides a PVC film production process. The PVC film production process can be executed by at least one of a server, a terminal, or other electronic device capable of executing the process provided by the present invention. In other words, the PVC film production process can be executed by software or hardware installed on a terminal or server device, where the software can be a blockchain platform. The server can include, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0023] Reference Figure 1 FIG. 1 is a flow chart of a PVC film production process according to an embodiment of the present invention. In this embodiment, the PVC film production process includes: S1. Receive a PVC film production instruction, and identify a PVC film production device based on the PVC film production instruction, wherein the PVC film production device includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit and a post-processing unit, wherein the raw material pretreatment unit includes: a microwave preprocessor, a temporary conveying pipeline, a circulation container and a preliminary mixer, the multi-layer mixing unit includes: a surface layer mixer, a middle layer mixer and an inner layer mixer, the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head, and the post-processing unit includes: a cooler and a winder.

[0024] It is understandable that the PVC film production instruction is an instruction issued by a person who wants to produce PVC film. PVC film is a thin film material produced by a PVC film production device, with polyvinyl chloride resin as the main raw material.

[0025] It should be understood that the PVC film production apparatus is a set of equipment systems for producing PVC film, which can realize a complete production process from raw material pretreatment to final product molding. The PVC film production apparatus includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit, and a post-processing unit. The raw material pretreatment unit is used to pre-treat the PVC raw material to ensure that the raw material reaches the appropriate temperature, mixing uniformity, and other conditions before entering the subsequent processing links. Specifically, the raw material pretreatment unit includes: a microwave pre-processor, a temporary conveying pipeline, a circulation container, and a preliminary mixer. The microwave pre-processor uses microwave heating technology to pre-treat the PVC raw material to a certain temperature and improve the plasticization effect of the PVC raw material. The temporary conveying pipeline is used to transport the pre-treated PVC raw material from the microwave pre-processor to a temporary storage area before the preliminary mixer, and is used to confirm and evaluate the temperature of the PVC raw material before being transported to the preliminary mixer. The circulation container is used to store pre-treated PVC raw material that has been processed by the microwave processor but has not reached the preliminary mixing standard. The preliminary mixer is used to perform preliminary mixing of the pre-treated PVC raw material to ensure the uniformity of the PVC raw material and prepare for subsequent multi-layer mixing. The multi-layer mixing unit is used to mix the pretreated PVC raw materials according to different formula ratios to prepare mixtures for the surface layer, middle layer, and inner layer, respectively, to meet the requirements of the multi-layer structure of the PVC film. Specifically, the multi-layer mixing unit includes: a surface layer mixer, a middle layer mixer, and an inner layer mixer. The surface layer mixer is specifically used to prepare the surface layer mixture, and specific additives are usually added to give the surface layer specific functions (such as antibacterial properties and wear resistance). The middle layer mixer is used to prepare the middle layer mixture, and additives with plasticizing or stabilizing functions are usually added to improve the stability of the film. The inner layer mixer is used to prepare the inner layer mixture, and specific additives are usually added to give the inner layer specific functions (such as waterproofing, sealing, etc.). Generally speaking, during the production of PVC film, corresponding additives are selected according to the target performance of the PVC film to give the surface layer, middle layer, and inner layer of the PVC film specific functions. The extrusion unit is used to extrude multiple layers of mixed materials to form a multi-layer composite PVC film, wherein the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder, and a co-extrusion die head. The surface layer extruder, middle layer extruder, and inner layer extruder are respectively used to heat and plasticize the surface layer, middle layer, and inner layer mixed materials to achieve a state suitable for extrusion. The co-extrusion die head is used to merge the multiple layers of plasticized mixed materials to form a multi-layer composite PVC film. The post-processing unit is used to cool, shape, and reel the extruded PVC film to achieve the final product form. Specifically, the post-processing unit includes: a cooler and a reel.The cooler is used to cool and shape the extruded PVC film. The cooler is typically divided into multiple cooling zones, including a high-temperature zone, a medium-temperature zone, and a low-temperature zone, to achieve gradual cooling and prevent the PVC film from generating internal stress or deformation due to a sudden drop in temperature. The winder is used to wind the cooled and shaped PVC film into a finished coil. For details, see [ ]. Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of a PVC film production device. Process optimization methods are used to improve the efficiency and adaptability of PVC film production.

[0026] S2. Obtain a formula ratio of the target PVC film, and identify a formula node set based on the formula ratio, wherein the formula node set includes multiple formula nodes, and each formula node includes a formula raw material type and a formula raw material weight, and identify an initial raw material set based on the formula node set.

[0027] It is understood that the target PVC film is a polyvinyl chloride film produced according to a specific formula ratio. The formula ratio refers to the relative weight ratio of the various raw materials in the production of the target PVC film. The formula node set is a collection of multiple formula nodes, each of which contains the specific raw material type and the corresponding raw material weight.

[0028] For example, assuming that the formula ratio of the target PVC film is: polyvinyl chloride resin: 80%, plasticizer: 15%, stabilizer: 3%, toughening agent: 2%. If it is planned to produce 100kg of PVC film, based on this formula ratio, the formula node set can be expressed as {(polyvinyl chloride resin, 80kg), (plasticizer, 15kg), (stabilizer, 3kg), (toughening agent, 2kg)}. Here, only the formula node (polyvinyl chloride resin, 80kg) is taken as an example: the formula node (polyvinyl chloride resin, 80kg) indicates that the type of formula raw material is polyvinyl chloride resin, and the corresponding formula raw material weight is 80kg. Other formula nodes can achieve the same effect as the formula node (polyvinyl chloride resin, 80kg), which will not be repeated here.

[0029] It should be explained that the initial raw material set determined based on the recipe node set includes: Perform the following operations on each recipe node in the recipe node set: Extracting the type of the formula raw material from the formula node, and using the type of the formula raw material to confirm the weight of the raw material corresponding to the type of the formula raw material in a pre-built raw material library to obtain the inventory weight of the raw material; Obtain inventory safety ratio, and obtain inventory safety weight based on the weight of formula raw materials and inventory safety ratio; Compare the weight of raw materials in stock with the safety weight of stock; If the weight of the raw materials in stock is greater than the safety weight of the stock, initial raw materials are obtained based on the raw material library, wherein the weight of the initial raw materials is the weight of the formula raw materials; otherwise, the weight of the supplementary raw materials is obtained using a preset supplement method, the sum of the weight of the supplementary raw materials and the weight of the formula raw materials is calculated to obtain an updated weight of the raw materials in stock, the updated weight of the raw materials in stock is used as the weight of the raw materials in stock, and the process returns to the step of comparing the weight of the raw materials in stock with the safety weight of the stock, until the weight of the raw materials in stock is greater than the safety weight of the stock; The initial raw materials are aggregated to obtain an initial raw material set.

[0030] It is understandable that the raw material warehouse refers to a system for storing and managing various raw materials (such as polyvinyl chloride resin, additives, etc.) required in the production process of PVC film, providing a stable and reliable supply of raw materials for the production of PVC film.

[0031] For example, assume that the recipe node set is {(polyvinyl chloride resin, 80kg), (plasticizer, 15kg), (stabilizer, 3kg), (toughener, 2kg)}, and take the recipe node (polyvinyl chloride resin, 80kg) as an example: in order to produce PVC film, a recipe raw material weight of 80kg of polyvinyl chloride resin is required. Assume that according to the recipe raw material type, the inventory raw material weight of polyvinyl chloride resin is confirmed to be 110kg in the raw material warehouse, and the inventory safety ratio is 150%. Based on the recipe raw material weight of 80kg and the inventory safety ratio of 150%, the inventory safety weight is 80kg*150%=120kg. At this time, the inventory raw material weight of 110kg is less than the inventory safety weight of 120kg. The preset replenishment method is used to obtain the supplementary raw material weight. Assuming that the supplementary raw material weight is 50kg, the sum of the supplementary raw material weight of 50kg and the recipe raw material weight of 110kg is calculated, and the updated inventory raw material weight is 160kg. At this time, the inventory raw material weight of 160kg is greater than the inventory safety weight of 120kg. Optionally, the replenishment method includes, but is not limited to, replenishment from a backup warehouse and allocation from other warehouses. This embodiment of the present invention dynamically adjusts raw material inventory by comparing the weight of raw materials in stock with the safe weight of the inventory, combining the inventory safety ratio and a preset replenishment method, to ensure sufficient and safe raw materials required for production, improve production stability and efficiency, and reduce the risk of production interruptions due to raw material shortages.

[0032] S3. Obtain a microwave processing parameter set, perform a preprocessing operation on the initial raw material set based on the microwave processing parameter set and the microwave preprocessor to obtain a processed raw material set, place the processed raw material set in the temporary conveying pipeline, and use a preset detection method to confirm the status of the processed raw material set, wherein the status is a qualified state or an unqualified state. After confirming that the status of the processed raw material set is a qualified state, use the preliminary mixer to perform a preliminary mixing operation on the processed raw material set to obtain a preliminary mixture.

[0033] It should be understood that the microwave processing parameter set refers to a set of parameters used to guide the microwave preprocessor in pre-treating the initial raw material set. The microwave processing parameter set includes, but is not limited to, microwave power, microwave duration, and microwave frequency. For example, assuming the microwave processing parameter set is represented by {(microwave power - 1000 W), (microwave duration - 3 minutes), (microwave frequency - 2.45 GHz)}, the pre-treatment operation is to pre-treat the initial raw material set using a microwave preprocessor set with a microwave power of 1000 W and a microwave frequency of 2.45 GHz for a microwave duration of 3 minutes. The post-processed raw material set refers to the raw material set after microwave pre-treatment, and its morphology can be compared to closely packed spherical particles. Optionally, the microwave processing parameter set can be adjusted based on the raw material characteristics and pre-treatment requirements of the initial raw material set to achieve optimal processing results.

[0034] Specifically, after confirming that the status of the processed raw material set is qualified, the following steps are performed: Acquire a monitoring temperature interval, wherein the monitoring temperature interval includes a maximum monitoring temperature value and a minimum monitoring temperature value; Get the total particle size detection time; The temperature of the processed raw material set is monitored in real time using a preset temperature monitoring technology to obtain a monitoring temperature; comparing the monitored temperature with the monitored temperature range; When the monitored temperature enters the monitoring temperature interval, the time of entering the monitoring temperature interval is used as the detection start time, and a first particle size set and a second particle size set are obtained based on the detection start time, the total particle size detection time, the preset number of detections, the temperature monitoring technology, and the pre-established particle size detection technology, wherein the first particle size set includes multiple first particle sizes and the second particle size set includes multiple second particle sizes; Calculating the mean and standard deviation of the first particle sizes in the first particle size set respectively to obtain the first particle size mean and the first particle size standard deviation; Calculate the mean and standard deviation of the second particle sizes in the second particle size set respectively to obtain the second particle size mean and the second particle size standard deviation; Obtaining a first weight and a second weight based on the first particle size set and the second particle size set, wherein the first weight is greater than the second weight, and the sum of the first weight and the second weight is 1, wherein the first particle size set corresponds to the first weight, and the second particle size set corresponds to the second weight; The process capability index is obtained based on the first particle size mean, the second particle size mean, the first particle size standard deviation, the second particle size standard deviation, the first weight, the second weight, and a pre-established process capability index calculation formula, wherein the process capability index calculation formula is as follows: ;in, represents the process capability index, represents the first particle size mean, represents the second particle size mean, represents the first particle size standard deviation, represents the second particle size standard deviation, represents the first weight, represents the second weight, Indicates the preset upper limit of particle size. Indicates the preset lower limit of particle size. Indicates taking the minimum value; comparing the process capability index with the preset process capability index threshold; If the process capability index is less than the process capability index threshold, the state of the processed raw material set is confirmed as an unqualified state and the processed raw material set is placed in the circulation container. The updated process capability index is obtained using a pre-built update method, and the updated process capability index is used as the process capability index and the step of comparing the process capability index with the preset process capability index threshold is returned until the process capability index is greater than or equal to the process capability index threshold, and the state of the processed raw material set is confirmed as a qualified state.

[0035] It is understood that the monitoring temperature is the temperature of the processed raw material set measured using temperature detection technology. Alternatively, infrared thermal imaging technology can be used to capture the thermal radiation from the surface of the processed raw material set. This is prior art and will not be further described here. The monitoring temperature range refers to the temperature range within which the processed raw material set resides when the particle size detection technology is used to determine its particle size. Using the particle size obtained within this monitoring temperature range to calculate the process capability index (PCI) yields a more accurate PCI. The purpose of setting a monitoring temperature range is to understand that, assuming that PVC raw materials maintain molecular stability only within a specific temperature range (e.g., 55-65°C), the post-processing raw material set experiences a temperature gradient (e.g., a surface-to-core temperature difference of 8-10°C) immediately after the microwave preprocessor is shut down. Furthermore, PVC raw materials are prone to forming aerosols at temperatures above 70°C, which can affect particle size detection and fail to reflect the true mixing state, resulting in a less accurate PCI.

[0036] It is understandable that the first particle size set and the second particle size set are used to obtain the first particle size mean, the second particle size mean, the first particle size standard deviation, and the second particle size standard deviation, the first particle size mean and the second particle size mean are respectively the mean of all first particle sizes in the first particle size set and the mean of all second particle sizes in the second particle size set, the first particle size standard deviation and the second particle size standard deviation are respectively the standard deviation of all first particle sizes in the first particle size set and the standard deviation of all second particle sizes in the second particle size set. Optionally, the process of obtaining the mean and the standard deviation is achievable with the existing technology and will not be described in detail here. Specifically, please refer to the subsequent embodiments for the process of obtaining the first particle size set and the second particle size set. The total particle size detection time refers to the entire time span from the start detection to the end detection during the particle size detection process, which is used to ensure that the particle size of the processed raw material set is accurately measured within the monitoring temperature range. Specifically, please refer to the subsequent embodiments for the process of obtaining the total particle size detection time.

[0037] It should be understood that the implementation process of the detection method is as follows: using a preset process capability index calculation formula to calculate the process capability index of the particle size corresponding to the processed raw material set, comparing the process capability index with the preset process capability index threshold, if the process capability index is greater than the process capability index threshold, the state of the processed raw material set is qualified, otherwise the state of the processed raw material set is unqualified, and the unqualified processed raw material set is placed in the circulation container. Generally speaking, when PVC raw materials are microwave-treated, it is usually difficult to restore them to their original state and re-microwave-treat them. At this time, the unqualified processed raw materials can be collected in the circulation container and used as experimental samples, providing rich materials for subsequent experimental research. By analyzing the characteristics of these unqualified processed raw materials, such as particle size distribution, microstructure, etc., we can deeply explore the problems that may arise during the microwave treatment process, thereby providing a basis for optimizing the microwave treatment parameter set and improving the treatment method. When the processed raw material set is in an unqualified state, an updated process capability index needs to be obtained using an update method. This update method is implemented by adjusting the microwave processing parameter set and re-obtaining the process capability index using the adjusted microwave processing parameter set. Adjusting the microwave processing parameter set includes, but is not limited to, increasing or decreasing the microwave frequency and adjusting the microwave duration. The qualified state indicates that the processed raw material set meets testing requirements and is eligible to proceed to the next production stage (performing a preliminary mixing operation). The unqualified state indicates that the processed raw material set does not meet testing requirements and is unable to proceed to the next production stage (performing a preliminary mixing operation). The testing requirement is that the process capability index corresponding to the processed raw material set is greater than a process capability index threshold. The process capability index measures the degree of match between the first and second particle size sets actually detected and the upper and lower particle size limits, which represent the upper and lower standard limits for evaluating the actual detected particle size, respectively.

[0038] It is understandable that after confirming that the state of the processed raw material set is qualified, the preliminary mixer is used to perform a preliminary mixing operation on the processed raw material set. The preliminary mixing operation refers to the first mixing treatment of the microwave-pretreated PVC raw materials in the process of producing PVC film, so as to make the composition or particle distribution of the PVC raw materials more uniform. The preliminary mixture is a collection of materials obtained after the qualified processed raw material set is subjected to a preliminary mixing operation.

[0039] In detail, the total time of obtaining the particle size detection includes: Obtain microwave-treated samples to confirm the total particle size measurement time; Acquire a detection experiment distance for setting a temperature experiment detection point, and confirm a plurality of temperature experiment detection points on the temporary conveying pipeline according to the detection experiment distance; Based on multiple temperature experiment detection points, microwave-treated samples, a preset experiment start time, a preset experiment end time, a preset number of experiments, and the temperature monitoring technology, multiple temperature experiment node sets are obtained, wherein the temperature experiment detection points correspond to the temperature experiment node sets one by one, and the temperature experiment node sets include multiple temperature experiment nodes, each temperature experiment node includes an experiment time and an experiment temperature value; Get the total particle size detection time based on multiple temperature experiment node sets.

[0040] It is understood that the microwave treatment of the sample is intended to determine the total particle size testing duration for the selected experimental PVC raw material. The purpose of determining the total particle size testing duration is to ensure that the temperature of the treated raw material remains within the monitoring temperature range from the start to the end of the particle size testing, thereby improving the accuracy of the process capability index calculation using particle size testing.

[0041] It is understandable that the detection experiment distance is used to set the interval distance between different temperature experiment detection points on the temporary conveying pipeline, and the temperature experiment detection point is the detection point for temperature detection confirmed by the detection experiment distance. For example, assuming that the length of the temporary conveying pipeline is 80 cm and the detection experiment distance is 10 cm, then 8 temperature experiment detection points can be confirmed on the temporary conveying pipeline using the detection experiment distance, and the distance between every two adjacent temperature experiment detection points is 10 cm. Specifically, by setting the temperature experiment detection points on the temporary conveying pipeline according to a fixed detection experiment distance, the uniformity and representativeness of the temperature detection can be improved, and the accuracy of the temperature detection results can be improved.

[0042] For example, assuming that the preset experiment start time and the preset experiment end time are 8:00:00 to 8:30:00 in the morning of a certain day, and the preset number of experiments is 30 times, during the time period from 8:00:00 to 8:30:00, each of the 8 temperature experiment detection points will collect 30 experimental temperature values, and obtain 30 temperature experiment nodes. Each temperature experiment node contains the experimental time and experimental temperature value, and the 30 temperature experiment nodes constitute a temperature experiment node set.

[0043] Furthermore, the total particle size detection time is obtained based on a plurality of temperature experiment node sets, including: The following operations are performed on each of the multiple temperature experiment node sets: Sort the temperature experiment nodes in the temperature experiment node set according to the order of the experiment times corresponding to the temperature experiment nodes from front to back to obtain a temperature experiment node sequence; Summarize the temperature experiment node sequences to obtain multiple temperature experiment node sequences; The total particle size detection time is obtained based on multiple temperature experiment node sequences, the maximum monitoring temperature value, the minimum monitoring temperature value, and a pre-built particle size detection total time calculation formula, wherein the particle size detection total time calculation formula is as follows: ;in, is the total time of particle size detection, Indicates shared A sequence of temperature experiment nodes, Indicates that there are a total of Temperature experiment nodes, Indicates the The first temperature experiment node in the sequence The experimental time corresponding to the temperature experimental node, Indicates the The first temperature experiment node in the sequence The experimental time corresponding to the temperature experimental node, Indicates the The first temperature experiment node in the sequence The experimental time corresponding to the first temperature experiment node is The absolute difference in time intervals between the experimental moments corresponding to the temperature experimental nodes, Indicates the The first temperature experiment node in the sequence The experimental temperature value corresponding to each temperature experiment node, Indicates the minimum monitoring temperature value, represents the maximum monitored temperature value, Represents a preset indicator function that returns 1 when the condition is met, otherwise it returns 0.

[0044] For example, only some temperature experiment nodes in one temperature experiment node sequence are taken as an example: assuming that the temperature experiment node sequence is {(8:10:00, 71.3℃), (8:11:00, 69.3℃), (8:12:00, 67.4℃), (8:13:00, 65.1℃), (8:14:00, 64.8℃), (8:15:00, 62.9℃), (8:16:00, 60.5℃), (8:17:00, 58.3℃)}, 8:00, 56.7℃)}, (8:19:00, 54.3℃)}, if the monitoring temperature range is (55℃-65℃), the corresponding maximum monitoring temperature value and minimum monitoring temperature value are 65℃ and 55℃ respectively. The total particle size detection time calculation formula is used to obtain the total particle size detection time. The implementation process of the particle size detection time calculation formula is as follows: Taking the temperature experiment node (8:10:00, 71.3℃) as an example, it is determined that the experimental temperature value of 71.3℃ is not in the monitoring temperature range (55℃-65℃) Therefore, the corresponding indicator function is 0. The absolute difference between the time intervals of the temperature experiment node (8:10:00, 71.3℃) and the temperature experiment node (8:11:00, 69.3℃) will not be used to accumulate the particle size detection time. Taking the temperature experiment node (8:15:00, 62.9℃) as an example, it is judged that the experimental temperature value of 62.9℃ is within the monitoring temperature range of (55℃-65℃). At this time, the corresponding indicator function is 1. The temperature experiment node (8:15:00, 62.9℃) and the temperature experiment node (8 :16:00, 60.5℃) can be used to accumulate the particle size detection time. The absolute difference of all time intervals that can be used to accumulate the particle size detection time is summed to obtain the particle size detection time corresponding to the temperature experiment node sequence, which is 5 minutes. After each temperature experiment node sequence obtains the corresponding particle size detection time, the average of all particle size detection time is taken as the total particle size detection time. The purpose of taking the average here is to improve the stability and reliability of the total particle size detection time and reduce the instability of a single result.

[0045] It should be explained that the acquisition of the first particle size set and the second particle size set based on the detection start time, the total particle size detection time, the preset number of detections, the temperature monitoring technology and the pre-built particle size detection technology includes: Acquire multiple detection moments based on the detection start time, the total particle size detection time, and the number of detections; Acquire a detection node set using multiple detection times, the temperature monitoring technology, and the particle size detection technology, wherein the detection node set includes multiple detection nodes, and each detection node includes a detection time, a detection temperature, and a detection particle size; The following operations are performed on each detection node in the detection node set: acquiring a first temperature interval based on the monitored temperature interval; If the detected temperature corresponding to the detection node is within the first temperature range, the detected particle size corresponding to the detection node is used as the first particle size; otherwise, the detected particle size corresponding to the detection node is used as the second particle size; The first particle size and the second particle size are respectively summarized to obtain a first particle size set and a second particle size set.

[0046] For example, assuming that the detection start time is 10:00:00 on a certain morning, the total particle size detection time is 10 minutes, and the number of detections is 5, the multiple detection times are: 10:02:00, 10:04:00, 10:06:00, 10:08:00, 10:10:00. Assuming that the detection node set obtained by temperature monitoring technology and particle size detection technology is {(10:02:00-65.2℃-80um), (10:04:00-63.5℃-85um), (10:06:00-62.4 Here we only take the detection node (10:02:00-67.2℃-80um) as an example: the detection node (10:02:00-67.2℃-80um) indicates that the detected temperature is 67.2℃ and the detected particle size is 80um at 10:02:00. Other detection nodes can achieve the same effect as the detection node (10:02:00-67.2℃-80um), which is not repeated here.

[0047] It is understood that the first temperature range is obtained based on the monitoring temperature range. Within the first temperature range, the physical state of the processed raw material set is more stable, resulting in more accurate particle size detection results. For example, if the monitoring temperature range is (55°C-65°C), the first temperature range can be set to (58°C-63°C). Detected particle sizes within the first temperature range (58°C-63°C) are used as the first particle size, and those that are not are used as the second particle size. Consequently, the first particle size set is {83µm, 86µm}, and the second particle size set is {80µm, 85µm, 82µm}. Because the particle size detection results corresponding to the first particle size set are more accurate, the first particle size set is assigned a higher weight (i.e., the first weight) when calculating the process capability index. Therefore, the first weight corresponding to the first particle size set is greater than the second weight corresponding to the second particle size set. Alternatively, particle size can be obtained using a laser particle size analyzer. This is conventional technology and will not be further described here. By setting the monitoring temperature range and the first temperature range, the embodiments of the present invention filter out particle size data for the processed raw material set in a stable state, thereby improving detection accuracy. Calculating the process capability index and adjusting the microwave treatment parameter set to ensure that the processed raw materials are qualified before entering the next production link can improve the quality of PVC film.

[0048] S4. Obtain target properties of the target PVC film, and obtain a surface layer mixture, a middle layer mixture, and an inner layer mixture based on the target properties, the preliminary mixture, and the multi-layer mixing unit.

[0049] It should be explained that the step of obtaining the surface layer mixture, the middle layer mixture and the inner layer mixture based on the target performance, the preliminary mixture and the multi-layer mixing unit includes: Performing an analysis operation on the target performance using a preset analysis method to obtain a surface additive node set, wherein the surface additive node set includes one or more surface additive nodes, and each surface additive node includes an additive name and an additive ratio; Obtaining the weight of the preliminary mixture to obtain the preliminary mixture weight; For each of the one or more surface additive nodes, perform the following operations: Obtaining the surface additive to be mixed corresponding to the surface additive node based on the preliminary mixture weight, additive name, additive ratio and a pre-built additive library; Summarizing the surface layer auxiliary agents to be mixed to obtain a surface layer auxiliary agent set; Obtaining a middle-layer set of to-be-mixed additives and an inner-layer set of to-be-mixed additives based on the analysis method, target performance, and the additive library; Divide the preliminary mixture into a surface layer preliminary mixture, a middle layer preliminary mixture and an inner layer preliminary mixture according to a preset ratio; The surface mixer is used to perform a secondary mixing operation on the surface auxiliary agent set to be mixed and the surface preliminary mixed material to obtain a surface mixed material; The middle layer mixture and the inner layer mixture are obtained based on the middle layer auxiliary agent set to be mixed, the inner layer auxiliary agent set to be mixed, the middle layer preliminary mixture, the inner layer preliminary mixture, the middle layer mixer and the inner layer mixer.

[0050] It is understandable that the target performance can be obtained based on the analysis of the use of the target PVC film. For example, assuming that the target PVC film is used to produce PVC floor mats used in bathrooms, then according to the application site of the target PVC, it can be considered to increase the wear resistance and anti-slip properties of the surface layer of the target PVC film, increase the stability of the middle layer of the target PVC film, and improve the waterproofness and flame retardancy of the inner layer of the target PVC film. The implementation process of performing an analysis operation on the target performance using a preset analysis method to obtain a surface additive node set is as follows: taking the performance of the target PVC film surface as an example, in order to increase the wear resistance and anti-slip properties of the target PVC film surface, it is considered to use polytetrafluoroethylene as an additive to improve the anti-slip properties of the target PVC film surface, and to use the wear-resistant agent aluminum oxide as an additive to improve the wear resistance of the PVC film surface, and obtain the surface additive node set {(polytetrafluoroethylene-0.01%), (aluminum oxide-0.05%)} corresponding to the target PVC film surface. Here, only the surface additive node (polytetrafluoroethylene-0.01%) is taken as an example: the surface additive node (polytetrafluoroethylene-0.01%) indicates that a polytetrafluoroethylene additive with an additive ratio of 0.01% needs to be added. Other surface additive nodes can achieve the same effect as the surface additive node (polytetrafluoroethylene-0.01%), which will not be repeated here.

[0051] For example, the additive library is a material library that stores various additives required for PVC film production. The required additives can be retrieved from the additive library based on the surface additive node set. For example, using the surface additive node (PTFE - 0.01%) as an example: assuming the initial mixture weighs 100 kg, a certain amount of PTFE additive can be retrieved from the additive library. The amount of PTFE additive is 0.01% of the initial mixture weight, resulting in 10 g of PTFE additive to be mixed in the surface layer.

[0052] It is understandable that the preliminary mixture is divided into a surface preliminary mixture, a middle preliminary mixture and an inner preliminary mixture according to a preset ratio. The preset ratio can be obtained through the thickness of the surface, middle and inner layers of the target PVC film. For example, the thickness of the surface, middle and inner layers of the target PVC film are required to be 1 mm, 0.5 mm and 0.5 mm respectively, and the thickness ratio of the surface, middle and inner layers is (surface layer 2: middle layer 1: inner layer 1). 100 kg of the preliminary mixture is divided into a surface preliminary mixture weighing 50 kg, a middle preliminary mixture weighing 25 kg and an inner preliminary mixture weighing 25 kg. A surface mixer is used to perform a secondary mixing operation on the surface auxiliary agent set to be mixed and the surface preliminary mixture to obtain a surface mixture. The secondary mixing operation refers to the process of deeply homogenizing the surface preliminary mixture (containing polyvinyl chloride resin, basic auxiliary agents, etc.) and the functional surface auxiliary agents (surface auxiliary agent set to be mixed) through a surface mixer to generate a surface mixture. Similarly, the process for obtaining the middle and inner layer mixtures is identical to that for the surface layer mixture and will not be further elaborated here. The embodiments of the present invention analyze the target properties of the target PVC film using a pre-set analysis method. After accurately determining the specific required properties of each layer, the additives for each layer are formulated accordingly. This not only meets the specific requirements of each layer but also improves the adaptability of the target PVC film during the production process, thereby better meeting the diverse application requirements of the target PVC film.

[0053] S5. Utilize a surface layer extruder, a middle layer extruder, an inner layer extruder, and a co-extrusion die head to perform an extrusion operation on the surface layer mixture, the middle layer mixture, and the inner layer mixture to obtain extruded materials.

[0054] It should be understood that the extrusion operation refers to the process of using a surface layer extruder, a middle layer extruder and an inner layer extruder to heat and melt the surface layer mixture, the middle layer mixture and the inner layer mixture respectively, and then compounding them through a co-extrusion die to obtain a multi-layer structure of the extruded material.

[0055] S6. Using the cooler to cool the extruded material to obtain a molded material, and using the winder to wind the molded material to obtain a target PVC film.

[0056] In detail, the cooler is used to cool the extruded material to obtain the molded material, including: Obtaining a temperature range of the material after extrusion, obtaining the temperature range of the material after extrusion, and obtaining a cooling range set based on the temperature range of the material after extrusion, wherein the cooling range set includes a target high temperature range, a target medium temperature range, and a target low temperature range; Identifying an initial high-temperature cooling zone, an initial medium-temperature cooling zone, and an initial low-temperature cooling zone based on the cooler; Obtaining a target high-temperature cooling zone, a target medium-temperature cooling zone, and a target low-temperature cooling zone based on the initial high-temperature cooling zone, the initial medium-temperature cooling zone, the initial low-temperature cooling zone, and the cooling interval set; The cooler and the preset cooling method are used to make the extruded material pass through the target high-temperature cooling zone, the target medium-temperature cooling zone and the target low-temperature cooling zone in sequence to obtain the molded material.

[0057] It is understandable that the process of obtaining the temperature range of the material after extrusion is as follows: a thermocouple or temperature sensor is installed at the outlet of the co-extrusion die head. During the extrusion process, the temperature of the extruded material is measured in real time by the sensor, and the temperature range of the material after extrusion is determined with the measured maximum and minimum temperatures as boundaries. For example, assuming that the temperature range of the material after extrusion is (180°C-190°C), in order to subsequently perform a cooling operation on the temperature range of the material after extrusion, the target high temperature range, target medium temperature range and target low temperature range can be set to (120°C-150°C), (60°C-90°C) and (20°C-40°C) respectively. The purpose of setting the target high temperature range, target medium temperature range and target low temperature range is to ensure that the temperature of the extruded material can be evenly and gradually reduced during the cooling process, so as to avoid affecting the performance and quality of the extruded material due to excessively rapid temperature changes.

[0058] It should be understood that the initial high-temperature cooling zone is the first cooling area of ​​the cooler, which is used for the first stage cooling of the extruded material, and reduces the temperature of the extruded material from a higher temperature range of the extruded material (e.g., 180-190°C) to a target high-temperature range (e.g., 120°C-150°C). The first stage cooling is to quickly reduce the temperature of the extruded material so that it enters a relatively low temperature range, while avoiding deformation or performance degradation of the extruded material due to excessive temperature. The initial medium-temperature cooling zone is the second cooling area of ​​the cooler, which is used for the second stage cooling of the extruded material, and is used to reduce the temperature of the extruded material from the target high-temperature range (e.g., 120°C-150°C). ) is further reduced to the target medium temperature range (for example, 60℃-90℃). The purpose of the second stage cooling is to continue to reduce the temperature of the extruded material while ensuring a uniform cooling process to avoid stress concentration or deformation caused by excessive temperature gradient. The initial low-temperature cooling zone is the third cooling area of ​​the cooler, which is used for the third stage cooling of the extruded material, and is used to further reduce the temperature of the extruded material from the target medium temperature range (for example, 60℃-90℃) to the target low temperature range (for example, 20℃-40℃). The purpose of the third stage cooling is to cool the extruded material to a temperature close to room temperature or lower, so as to ensure that the material has good physical properties and dimensional stability during subsequent processing or use.

[0059] Furthermore, the acquiring of the target high temperature cooling zone, the target medium temperature cooling zone and the target low temperature cooling zone based on the initial high temperature cooling zone, the initial medium temperature cooling zone, the initial low temperature cooling zone and the cooling interval set includes: Obtaining an initial high temperature interval based on the initial high temperature cooling zone; Compare the maximum temperature value corresponding to the initial high temperature interval with the minimum temperature value corresponding to the target high temperature interval, and the minimum temperature value corresponding to the initial high temperature interval with the maximum temperature value corresponding to the target high temperature interval; If the maximum temperature value corresponding to the initial high temperature interval is less than the minimum temperature value corresponding to the target high temperature interval or the minimum temperature value corresponding to the initial high temperature interval is greater than the maximum temperature value corresponding to the target high temperature interval, the target high temperature interval and the initial high temperature cooling area are used to obtain the target high temperature cooling area. Otherwise, a high temperature overlap ratio is obtained based on the initial high temperature interval and the target high temperature interval, wherein the high temperature overlap ratio is the ratio of the absolute temperature difference of the overlapping portion between the initial high temperature interval and the target high temperature interval to the absolute temperature difference of the target high temperature interval. comparing the high temperature coincidence ratio with a preset coincidence ratio threshold; If the high-temperature coincidence ratio is greater than the coincidence ratio threshold, the initial high-temperature cooling zone is used as the target high-temperature cooling zone; otherwise, the initial high-temperature cooling zone is adjusted using a preset adjustment method to obtain an updated initial high-temperature interval, the updated initial high-temperature interval is used as the initial high-temperature interval, and the process returns to the step of obtaining the high-temperature coincidence ratio based on the initial high-temperature interval and the target high-temperature interval until the high-temperature coincidence ratio is greater than the coincidence ratio threshold, thereby obtaining the target high-temperature cooling zone; The target medium-temperature cooling area and the target low-temperature cooling area are obtained based on the initial medium-temperature cooling area and the target medium-temperature interval, and the initial low-temperature cooling area and the target low-temperature interval, respectively.

[0060] For example, if the target high temperature range is (120°C-150°C) and the initial high temperature range is (90°C-110°C), and the maximum temperature of the initial high temperature range (110°C) is less than the minimum temperature of the target high temperature range (120°C), the target high temperature cooling area is obtained using the target high temperature range and the initial high temperature cooling area. The target high temperature cooling area can be obtained by adjusting the temperature of the cooling medium (e.g., water or coolant). If the target high temperature range is (120°C-150°C) and the initial high temperature range is (120°C-140°C), the high temperature overlap ratio is obtained by calculating the ratio of the absolute temperature difference of 20°C between the overlapping portion of the initial high temperature range and the target high temperature range to the absolute temperature difference of 30°C between the target high temperature range (i.e., 2 / 3). If the overlap ratio threshold is 4 / 5, and the high temperature overlap ratio of 2 / 3 is less than the overlap ratio threshold of 4 / 5, the initial high temperature cooling area needs to be adjusted using a preset adjustment method. The adjustment method includes, but is not limited to, lowering the temperature of the cooling medium (e.g., water or coolant) and adjusting the circulation rate of the cooling medium. Assuming the updated high-temperature range after adjustment is (120°C-145°C), and the updated high-temperature overlap ratio is 5 / 6, which is greater than the overlap ratio threshold of 4 / 5, the target high-temperature cooling zone is obtained. Similarly, the process for obtaining the target medium-temperature cooling zone and the target low-temperature cooling zone is the same as that for obtaining the target high-temperature cooling zone, so it will not be repeated here.

[0061] It is understood that the preset cooling method involves first passing through a target high-temperature cooling zone, then a target medium-temperature cooling zone, and finally a target low-temperature cooling zone. This is intended to gradually reduce the temperature of the extruded material, ensuring that it reaches the desired final temperature uniformly and stably during the cooling process, thereby obtaining a formed material. The formed material refers to the PVC film in a uniform and stable state after undergoing gradual cooling (target high-temperature cooling zone, target medium-temperature cooling zone, and target low-temperature cooling zone) to the desired final temperature. The winding operation refers to the process of winding the formed material into a roll using a winder for subsequent storage, transportation, and use. The target PVC film refers to the target PVC film product that has achieved the desired performance and dimensional requirements after microwave pretreatment, extrusion, cooling, and winding. The embodiments of the present invention achieve precise, step-by-step cooling of the extruded material by setting different temperature cooling zones. A multi-stage gradient cooling process (high to medium to low temperature) is employed to precisely control the cooling rate of the target PVC film, avoiding internal stress concentration, deformation, or surface defects caused by sudden cooling. This effectively ensures the performance stability and dimensional accuracy of the target PVC film during the cooling process, thereby improving product quality and production efficiency.

[0062] The present invention is to solve the problem described in the background technology. The present invention receives a PVC film production instruction and identifies a PVC film production device based on the PVC film production instruction, wherein the PVC film production device includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit and a post-processing unit, wherein the raw material pretreatment unit includes: a microwave preprocessor, a temporary conveying pipeline, a circulation container and a preliminary mixer, wherein the multi-layer mixing unit includes: a surface mixer, a middle layer mixer and an inner layer mixer, wherein the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head, wherein the post-processing unit includes: a cooler and a winder, obtains the formula ratio of the target PVC film, and identifies a formula node set based on the formula ratio, wherein the formula node set includes multiple formula nodes, and each formula node includes the type of formula raw materials and the weight of formula raw materials, and identifies the initial raw material set based on the formula node set. It can be seen that the present invention dynamically adjusts the raw material inventory by comparing the inventory raw material weight with the inventory safety weight, combining the inventory safety ratio and the preset replenishment method, to ensure that the raw materials required for production are sufficient and safe, improve production stability and efficiency, and reduce the risk of production interruption due to insufficient raw materials. A microwave processing parameter set is obtained, and a preprocessing operation is performed on the initial raw material set based on the microwave processing parameter set and the microwave preprocessor to obtain a processed raw material set. The processed raw material set is placed in the temporary conveying pipeline, and the status of the processed raw material set is confirmed by a preset detection method, wherein the status is a qualified state or an unqualified state. After confirming that the status of the processed raw material set is a qualified state, the preliminary mixer is used to perform a preliminary mixing operation on the processed raw material set to obtain a preliminary mixture. It can be seen that the present invention screens out the particle size data of the processed raw material set in a stable state by setting the monitoring temperature range and the first temperature range, thereby improving the detection accuracy.Calculating the process capability index and adjusting the microwave processing parameter set to ensure that the processed raw materials are collected and enter the next production link can improve the quality of the PVC film and obtain the target performance of the target PVC film. Based on the target performance, the preliminary mixture and the multi-layer mixing unit, the surface layer mixture, the middle layer mixture and the inner layer mixture are obtained. It can be seen that the present invention analyzes the target performance of the target PVC film through a preset analysis method, and after accurately determining the specific required performance of each layer, the additives of each layer are deployed accordingly, which not only meets the specific requirements of each layer, but also improves the adaptability of the target PVC film in the production process, thereby better meeting the diversified application requirements of the target PVC film, and utilizing the surface layer extruder, the middle layer extruder, the inner layer extruder, the surface layer extruder, the middle layer extruder and the inner layer extruder. The layer extruder and co-extrusion die extrudes the surface layer mixture, the middle layer mixture, and the inner layer mixture to obtain an extruded material. The extruded material is then cooled by the cooler to obtain a formed material. The formed material is then reeled up by the reel to obtain the target PVC film. This demonstrates that the present invention achieves precise, step-by-step cooling of the extruded material by setting cooling zones of varying temperatures. A multi-stage gradient cooling process (high temperature to medium temperature to low temperature) is employed to precisely control the cooling rate of the target PVC film, avoiding internal stress concentration, deformation, or surface defects caused by sudden cooling. This effectively ensures the performance stability and dimensional accuracy of the target PVC film during the cooling process, thereby improving product quality and production efficiency. Therefore, the present invention can enhance the efficiency and adaptability of PVC film production.

[0063] like Figure 2 FIG. 1 is a functional module diagram of a PVC film production system provided by one embodiment of the present invention.

[0064] The PVC film production system 100 described herein can be installed in an electronic device. Depending on the functionality implemented, the system can include an initial raw material acquisition module 101, a multi-layer mixing module 102, a multi-layer extrusion module 103, and a cooling and winding module 104. A module, also referred to as a unit, is a series of computer program segments that can be executed by a processor in an electronic device and perform a fixed function. These modules are stored in the electronic device's memory.

[0065] The initial raw material acquisition module 101 is used to receive a PVC film production instruction and identify a PVC film production device based on the PVC film production instruction, wherein the PVC film production device includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit and a post-processing unit, wherein the raw material pretreatment unit includes: a microwave pre-processor, a temporary conveying pipeline, a circulation container and a preliminary mixer, the multi-layer mixing unit includes: a surface layer mixer, a middle layer mixer and an inner layer mixer, the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head, and the post-processing unit includes: a cooler and a winder; Obtaining a target PVC film recipe ratio, determining a recipe node set based on the recipe ratio, wherein the recipe node set includes multiple recipe nodes, and each recipe node includes a recipe raw material type and recipe raw material weight, and determining an initial raw material set based on the recipe node set; The multi-layer mixing module 102 is used to obtain a microwave processing parameter set, perform a preprocessing operation on the initial raw material set based on the microwave processing parameter set and the microwave preprocessor to obtain a processed raw material set, place the processed raw material set in the temporary conveying pipeline, and use a preset detection method to confirm the status of the processed raw material set, wherein the status is a qualified state or an unqualified state. After confirming that the status of the processed raw material set is a qualified state, use the preliminary mixer to perform a preliminary mixing operation on the processed raw material set to obtain a preliminary mixed material; Obtaining target properties of a target PVC film, and obtaining a surface layer mixture, a middle layer mixture, and an inner layer mixture based on the target properties, the preliminary mixture, and the multi-layer mixing unit; The multi-layer extrusion module 103 is used to perform an extrusion operation on the surface layer mixture, the middle layer mixture and the inner layer mixture using a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head to obtain an extruded material; The cooling and winding module 104 is used to cool the extruded material using the cooler to obtain a molded material, and to wind the molded material using the winder to obtain a target PVC film.

[0066] In detail, each module in the PVC film production system 100 of the embodiment of the present invention adopts the same method as above when in use. Figure 1 The same technical means as the PVC film production process described in the previous section can produce the same technical effects, so I will not go into details here.

[0067] like Figure 3 FIG. 1 is a schematic structural diagram of an electronic device for implementing a PVC film production process according to an embodiment of the present invention.

[0068] The electronic device 1 may include a processor 10 , a memory 11 and a bus 12 , and may further include a computer program stored in the memory 11 and executable on the processor 10 , such as a PVC film production process program.

[0069] The memory 11 includes at least one type of readable storage medium, including flash memory, a removable hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory), a magnetic memory, a magnetic disk, an optical disk, etc. In some embodiments, the memory 11 may be an internal storage unit of the electronic device 1, such as a removable hard disk of the electronic device 1. In other embodiments, the memory 11 may also be an external storage device of the electronic device 1, such as a plug-in removable hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc. equipped on the electronic device 1. Furthermore, the memory 11 includes both the internal storage unit of the electronic device 1 and an external storage device. The memory 11 can be used not only to store application software installed in the electronic device 1 and various data, such as the code for the PVC film production process program, but also to temporarily store data that has been output or is about to be output.

[0070] In some embodiments, the processor 10 may be comprised of an integrated circuit, such as a single packaged integrated circuit or multiple packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and combinations of various control chips. The processor 10 is the control core (control unit) of the electronic device, connecting the various components of the electronic device using various interfaces and circuits. It executes programs or modules (e.g., PVC film production process programs) stored in the memory 11 and accesses data stored in the memory 11 to perform various functions and process data.

[0071] The bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus 12 may be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to enable communication between the memory 11 and at least one processor 10, etc.

[0072] Figure 3 Only the electronic device with components is shown, and it can be understood by those skilled in the art that Figure 3The structure shown does not constitute a limitation on the electronic device 1 , and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0073] For example, although not shown, the electronic device 1 may further include a power source (e.g., a battery) to power various components. Preferably, the power source may be logically connected to the at least one processor 10 via a power management system, thereby enabling functions such as charge management, discharge management, and power consumption management through the power management system. The power source may further include any components such as one or more DC or AC power sources, a recharging system, a power failure detection circuit, a power converter or inverter, and a power status indicator. The electronic device 1 may further include various sensors, Bluetooth modules, Wi-Fi modules, etc., which are not further described here.

[0074] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0075] Optionally, the electronic device 1 may further include a user interface, which may be a display or an input unit (such as a keyboard). Optionally, the user interface may also be a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. The display may also be appropriately referred to as a display screen or a display unit, and is used to display information processed by the electronic device 1 and to display a visual user interface.

[0076] The PVC film production process program stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When executed in the processor 10, the following can be achieved: receiving a PVC film production instruction, and identifying a PVC film production device based on the PVC film production instruction, wherein the PVC film production device includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit, and a post-processing unit, wherein the raw material pretreatment unit includes: a microwave pre-processor, a temporary conveying pipeline, a circulation container, and a preliminary mixer, the multi-layer mixing unit includes: a surface layer mixer, a middle layer mixer, and an inner layer mixer, the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder, and a co-extrusion die, and the post-processing unit includes: a cooler and a winder; Obtaining a target PVC film recipe ratio, determining a recipe node set based on the recipe ratio, wherein the recipe node set includes multiple recipe nodes, and each recipe node includes a recipe raw material type and recipe raw material weight, and determining an initial raw material set based on the recipe node set; obtaining a microwave processing parameter set, performing a preprocessing operation on an initial raw material set based on the microwave processing parameter set and a microwave preprocessor to obtain a processed raw material set, placing the processed raw material set in the temporary conveying pipeline, and confirming a status of the processed raw material set using a preset detection method, wherein the status is a qualified state or an unqualified state. After confirming that the status of the processed raw material set is a qualified state, performing a preliminary mixing operation on the processed raw material set using the preliminary mixer to obtain a preliminary mixed material; Obtaining target properties of a target PVC film, and obtaining a surface layer mixture, a middle layer mixture, and an inner layer mixture based on the target properties, the preliminary mixture, and the multi-layer mixing unit; Utilizing a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head, an extrusion operation is performed on the surface layer mixture, the middle layer mixture and the inner layer mixture to obtain extruded materials; The cooler is used to cool the extruded material to obtain a molded material, and the winder is used to wind the molded material to obtain a target PVC film.

[0077] Specifically, the specific implementation process of the processor 10 for the above instructions can refer to Figures 1 to 3 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0078] Furthermore, if the modules / units integrated into the electronic device 1 are implemented as software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. The computer-readable storage medium may be volatile or non-volatile. For example, the computer-readable medium may include any entity or system capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard drive, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM).

[0079] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program. When the computer program is executed by a processor of an electronic device, the computer program can implement: receiving a PVC film production instruction, and identifying a PVC film production device based on the PVC film production instruction, wherein the PVC film production device includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit, and a post-processing unit, wherein the raw material pretreatment unit includes: a microwave pre-processor, a temporary conveying pipeline, a circulation container, and a preliminary mixer, the multi-layer mixing unit includes: a surface layer mixer, a middle layer mixer, and an inner layer mixer, the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder, and a co-extrusion die, and the post-processing unit includes: a cooler and a winder; Obtaining a target PVC film recipe ratio, determining a recipe node set based on the recipe ratio, wherein the recipe node set includes multiple recipe nodes, and each recipe node includes a recipe raw material type and recipe raw material weight, and determining an initial raw material set based on the recipe node set; obtaining a microwave processing parameter set, performing a preprocessing operation on an initial raw material set based on the microwave processing parameter set and a microwave preprocessor to obtain a processed raw material set, placing the processed raw material set in the temporary conveying pipeline, and confirming a status of the processed raw material set using a preset detection method, wherein the status is a qualified state or an unqualified state. After confirming that the status of the processed raw material set is a qualified state, performing a preliminary mixing operation on the processed raw material set using the preliminary mixer to obtain a preliminary mixed material; Obtaining target properties of a target PVC film, and obtaining a surface layer mixture, a middle layer mixture, and an inner layer mixture based on the target properties, the preliminary mixture, and the multi-layer mixing unit; Utilizing a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head, an extrusion operation is performed on the surface layer mixture, the middle layer mixture and the inner layer mixture to obtain extruded materials; The cooler is used to cool the extruded material to obtain a molded material, and the winder is used to wind the molded material to obtain a target PVC film.

[0080] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, systems and processes can be implemented in other ways. For example, the system embodiments described above are only exemplary, and actual implementations may have other division methods.

[0081] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed across multiple network elements. Some or all of the modules may be selected to achieve the purpose of the solution of this embodiment according to actual needs.

[0082] In addition, the functional modules in various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or hardware plus software functional modules.

[0083] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A PVC film production process, characterized in that: The process comprises: receiving a PVC film production instruction, and identifying a PVC film production device based on the PVC film production instruction, wherein the PVC film production device includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit, and a post-processing unit, wherein the raw material pretreatment unit includes: a microwave pre-processor, a temporary conveying pipeline, a circulation container, and a preliminary mixer, the multi-layer mixing unit includes: a surface layer mixer, a middle layer mixer, and an inner layer mixer, the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder, and a co-extrusion die, and the post-processing unit includes: a cooler and a winder; Obtaining a target PVC film recipe ratio, determining a recipe node set based on the recipe ratio, wherein the recipe node set includes multiple recipe nodes, and each recipe node includes a recipe raw material type and recipe raw material weight, and determining an initial raw material set based on the recipe node set; obtaining a microwave processing parameter set, performing a preprocessing operation on an initial raw material set based on the microwave processing parameter set and a microwave preprocessor to obtain a processed raw material set, placing the processed raw material set in the temporary conveying pipeline, and confirming a status of the processed raw material set using a preset detection method, wherein the status is a qualified state or an unqualified state. After confirming that the status of the processed raw material set is a qualified state, performing a preliminary mixing operation on the processed raw material set using the preliminary mixer to obtain a preliminary mixed material; Obtaining target properties of a target PVC film, and obtaining a surface layer mixture, a middle layer mixture, and an inner layer mixture based on the target properties, the preliminary mixture, and the multi-layer mixing unit; Utilizing a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head, an extrusion operation is performed on the surface layer mixture, the middle layer mixture and the inner layer mixture to obtain extruded materials; The cooler is used to cool the extruded material to obtain a molded material, and the winder is used to wind the molded material to obtain a target PVC film.

2. The PVC film production process according to claim 1, characterized in that: The determining of the initial raw material set based on the recipe node set includes: Perform the following operations on each recipe node in the recipe node set: Extracting the type of the formula raw material from the formula node, and using the type of the formula raw material to confirm the weight of the raw material corresponding to the type of the formula raw material in a pre-built raw material library to obtain the inventory weight of the raw material; Obtain inventory safety ratio, and obtain inventory safety weight based on the weight of formula raw materials and inventory safety ratio; Compare the weight of raw materials in stock with the safety weight of stock; If the weight of the raw materials in stock is greater than the safety weight of the stock, initial raw materials are obtained based on the raw material library, wherein the weight of the initial raw materials is the weight of the formula raw materials; otherwise, the weight of the supplementary raw materials is obtained using a preset supplement method, the sum of the weight of the supplementary raw materials and the weight of the formula raw materials is calculated to obtain an updated weight of the raw materials in stock, the updated weight of the raw materials in stock is used as the weight of the raw materials in stock, and the process returns to the step of comparing the weight of the raw materials in stock with the safety weight of the stock, until the weight of the raw materials in stock is greater than the safety weight of the stock; The initial raw materials are aggregated to obtain an initial raw material set.

3. The PVC film production process according to claim 2, characterized in that: After confirming that the status of the processed raw material set is qualified, the method includes: Acquire a monitoring temperature interval, wherein the monitoring temperature interval includes a maximum monitoring temperature value and a minimum monitoring temperature value; Get the total particle size detection time; The temperature of the processed raw material set is monitored in real time using a preset temperature monitoring technology to obtain a monitoring temperature; comparing the monitored temperature with the monitored temperature range; When the monitored temperature enters the monitoring temperature interval, the time of entering the monitoring temperature interval is used as the detection start time, and a first particle size set and a second particle size set are obtained based on the detection start time, the total particle size detection time, the preset number of detections, the temperature monitoring technology, and the pre-established particle size detection technology, wherein the first particle size set includes multiple first particle sizes and the second particle size set includes multiple second particle sizes; Calculating the mean and standard deviation of the first particle sizes in the first particle size set respectively to obtain the first particle size mean and the first particle size standard deviation; Calculate the mean and standard deviation of the second particle sizes in the second particle size set respectively to obtain the second particle size mean and the second particle size standard deviation; Obtaining a first weight and a second weight based on the first particle size set and the second particle size set, wherein the first weight is greater than the second weight, and the sum of the first weight and the second weight is 1, wherein the first particle size set corresponds to the first weight, and the second particle size set corresponds to the second weight; The process capability index is obtained based on the first particle size mean, the second particle size mean, the first particle size standard deviation, the second particle size standard deviation, the first weight, the second weight, and a pre-established process capability index calculation formula, wherein the process capability index calculation formula is as follows: ； in, represents the process capability index, represents the first particle size mean, represents the second particle size mean, represents the first particle size standard deviation, represents the second particle size standard deviation, represents the first weight, represents the second weight, Indicates the preset upper limit of particle size. Indicates the preset lower limit of particle size. Indicates taking the minimum value; comparing the process capability index with a preset process capability index threshold; If the process capability index is less than the process capability index threshold, the state of the processed raw material set is confirmed as an unqualified state and the processed raw material set is placed in the circulation container. The updated process capability index is obtained using a pre-built update method, and the updated process capability index is used as the process capability index and the step of comparing the process capability index with the preset process capability index threshold is returned until the process capability index is greater than or equal to the process capability index threshold, and the state of the processed raw material set is confirmed as a qualified state.

4. The PVC film production process according to claim 3, wherein: The total time for obtaining the particle size detection includes: Obtain microwave-treated samples to confirm the total particle size measurement time; Acquire a detection experiment distance for setting a temperature experiment detection point, and confirm a plurality of temperature experiment detection points on the temporary conveying pipeline according to the detection experiment distance; Based on multiple temperature experiment detection points, microwave-treated samples, a preset experiment start time, a preset experiment end time, a preset number of experiments, and the temperature monitoring technology, multiple temperature experiment node sets are obtained, wherein the temperature experiment detection points correspond to the temperature experiment node sets one by one, and the temperature experiment node sets include multiple temperature experiment nodes, each temperature experiment node includes an experiment time and an experiment temperature value; Get the total particle size detection time based on multiple temperature experiment node sets.

5. The PVC film production process according to claim 4, characterized in that: The total particle size detection time is obtained based on multiple temperature experiment node sets, including: The following operations are performed on each of the multiple temperature experiment node sets: Sort the temperature experiment nodes in the temperature experiment node set according to the order of the experiment times corresponding to the temperature experiment nodes from front to back to obtain a temperature experiment node sequence; Summarize the temperature experiment node sequences to obtain multiple temperature experiment node sequences; The total particle size detection time is obtained based on multiple temperature experiment node sequences, the maximum monitoring temperature value, the minimum monitoring temperature value, and a pre-built particle size detection total time calculation formula, wherein the particle size detection total time calculation formula is as follows: ； in, is the total time of particle size detection, Indicates shared A sequence of temperature experiment nodes, Indicates that there are a total of Temperature experiment nodes, Indicates the The first temperature experiment node in the sequence The experimental time corresponding to the temperature experimental node, Indicates the The first temperature experiment node in the sequence The experimental time corresponding to the temperature experimental node, Indicates the The first temperature experiment node in the sequence The experimental time corresponding to the first temperature experiment node is The absolute difference in time intervals between the experimental moments corresponding to the temperature experimental nodes, Indicates the The first temperature experiment node in the sequence The experimental temperature value corresponding to each temperature experiment node, Indicates the minimum monitoring temperature value, represents the maximum monitored temperature value, Represents a preset indicator function that returns 1 when the condition is met, otherwise it returns 0.

6. The PVC film production process according to claim 5, characterized in that: The obtaining of the first particle size set and the second particle size set based on the detection start time, the total particle size detection time, the preset number of detections, the temperature monitoring technology, and the pre-built particle size detection technology includes: Acquire multiple detection moments based on the detection start time, the total particle size detection time, and the number of detections; Acquire a detection node set using multiple detection times, the temperature monitoring technology, and the particle size detection technology, wherein the detection node set includes multiple detection nodes, and each detection node includes a detection time, a detection temperature, and a detection particle size; The following operations are performed on each detection node in the detection node set: acquiring a first temperature interval based on the monitored temperature interval; If the detected temperature corresponding to the detection node is within the first temperature range, the detected particle size corresponding to the detection node is used as the first particle size; otherwise, the detected particle size corresponding to the detection node is used as the second particle size; The first particle size and the second particle size are respectively summarized to obtain a first particle size set and a second particle size set.

7. The PVC film production process according to claim 6, characterized in that: The obtaining of the surface layer mixture, the middle layer mixture and the inner layer mixture based on the target performance, the preliminary mixture and the multi-layer mixing unit includes: Performing an analysis operation on the target performance using a preset analysis method to obtain a surface additive node set, wherein the surface additive node set includes one or more surface additive nodes, and each surface additive node includes an additive name and an additive ratio; Obtaining the weight of the preliminary mixture to obtain the preliminary mixture weight; For each of the one or more surface additive nodes, perform the following operations: Obtaining the surface additive to be mixed corresponding to the surface additive node based on the preliminary mixture weight, additive name, additive ratio and a pre-built additive library; Summarizing the surface layer auxiliary agents to be mixed to obtain a surface layer auxiliary agent set; Obtaining a middle-layer set of to-be-mixed additives and an inner-layer set of to-be-mixed additives based on the analysis method, target performance, and the additive library; Divide the preliminary mixture into a surface layer preliminary mixture, a middle layer preliminary mixture and an inner layer preliminary mixture according to a preset ratio; The surface mixer is used to perform a secondary mixing operation on the surface auxiliary agent set to be mixed and the surface preliminary mixed material to obtain a surface mixed material; The middle layer mixture and the inner layer mixture are obtained based on the middle layer auxiliary agent set to be mixed, the inner layer auxiliary agent set to be mixed, the middle layer preliminary mixture, the inner layer preliminary mixture, the middle layer mixer and the inner layer mixer.

8. The PVC film production process according to claim 7, characterized in that: The method of using the cooler to cool the extruded material to obtain the formed material comprises: Obtaining a temperature range of the material after extrusion, obtaining the temperature range of the material after extrusion, and obtaining a cooling range set based on the temperature range of the material after extrusion, wherein the cooling range set includes a target high temperature range, a target medium temperature range, and a target low temperature range; Identifying an initial high-temperature cooling zone, an initial medium-temperature cooling zone, and an initial low-temperature cooling zone based on the cooler; Obtaining a target high-temperature cooling zone, a target medium-temperature cooling zone, and a target low-temperature cooling zone based on the initial high-temperature cooling zone, the initial medium-temperature cooling zone, the initial low-temperature cooling zone, and the cooling interval set; The cooler and the preset cooling method are used to make the extruded material pass through the target high-temperature cooling zone, the target medium-temperature cooling zone and the target low-temperature cooling zone in sequence to obtain the molded material.

9. The PVC film production process according to claim 8, characterized in that: The acquiring of the target high temperature cooling zone, the target medium temperature cooling zone, and the target low temperature cooling zone based on the initial high temperature cooling zone, the initial medium temperature cooling zone, the initial low temperature cooling zone, and the cooling interval set includes: Obtaining an initial high temperature interval based on the initial high temperature cooling zone; Compare the maximum temperature value corresponding to the initial high temperature interval with the minimum temperature value corresponding to the target high temperature interval, and the minimum temperature value corresponding to the initial high temperature interval with the maximum temperature value corresponding to the target high temperature interval; If the maximum temperature value corresponding to the initial high temperature interval is less than the minimum temperature value corresponding to the target high temperature interval or the minimum temperature value corresponding to the initial high temperature interval is greater than the maximum temperature value corresponding to the target high temperature interval, the target high temperature interval and the initial high temperature cooling area are used to obtain the target high temperature cooling area. Otherwise, a high temperature overlap ratio is obtained based on the initial high temperature interval and the target high temperature interval, wherein the high temperature overlap ratio is the ratio of the absolute temperature difference of the overlapping portion between the initial high temperature interval and the target high temperature interval to the absolute temperature difference of the target high temperature interval. comparing the high temperature coincidence ratio with a preset coincidence ratio threshold; If the high-temperature coincidence ratio is greater than the coincidence ratio threshold, the initial high-temperature cooling zone is used as the target high-temperature cooling zone; otherwise, the initial high-temperature cooling zone is adjusted using a preset adjustment method to obtain an updated initial high-temperature interval, the updated initial high-temperature interval is used as the initial high-temperature interval, and the process returns to the step of obtaining the high-temperature coincidence ratio based on the initial high-temperature interval and the target high-temperature interval until the high-temperature coincidence ratio is greater than the coincidence ratio threshold, thereby obtaining the target high-temperature cooling zone; The target medium-temperature cooling area and the target low-temperature cooling area are obtained based on the initial medium-temperature cooling area and the target medium-temperature interval, and the initial low-temperature cooling area and the target low-temperature interval, respectively.

10. A PVC film production system, characterized in that: The system comprises: An initial raw material acquisition module is used to receive a PVC film production instruction and identify a PVC film production device based on the PVC film production instruction, wherein the PVC film production device includes: a raw material pretreatment unit, a multi-layer mixing unit, an extrusion unit and a post-processing unit, wherein the raw material pretreatment unit includes: a microwave pre-processor, a temporary conveying pipeline, a circulation container and a preliminary mixer, the multi-layer mixing unit includes: a surface layer mixer, a middle layer mixer and an inner layer mixer, the extrusion unit includes: a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head, and the post-processing unit includes: a cooler and a winder; Obtaining a target PVC film recipe ratio, determining a recipe node set based on the recipe ratio, wherein the recipe node set includes multiple recipe nodes, and each recipe node includes a recipe raw material type and recipe raw material weight, and determining an initial raw material set based on the recipe node set; a multi-layer mixing module, configured to obtain a microwave processing parameter set, perform a preprocessing operation on an initial raw material set based on the microwave processing parameter set and a microwave preprocessor to obtain a processed raw material set, place the processed raw material set in the temporary conveying pipeline, and confirm a status of the processed raw material set using a preset detection method, wherein the status is either a qualified state or an unqualified state. After confirming that the status of the processed raw material set is a qualified state, perform a preliminary mixing operation on the processed raw material set using the preliminary mixer to obtain a preliminary mixed material; Obtaining target properties of a target PVC film, and obtaining a surface layer mixture, a middle layer mixture, and an inner layer mixture based on the target properties, the preliminary mixture, and the multi-layer mixing unit; A multi-layer extrusion module is used to extrude the surface layer mixture, the middle layer mixture and the inner layer mixture using a surface layer extruder, a middle layer extruder, an inner layer extruder and a co-extrusion die head to obtain extruded materials; The cooling and winding module is used to use the cooler to cool the extruded material to obtain the molded material, and use the winder to wind the molded material to obtain the target PVC film.

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